using a scale of 2cm to 1 unit on the x axis and 2cm to 2 unit on the y axis draw the graph of y=(x-4)(4+2) for -3 is less than or equal to x less than or equal to 5

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)